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3 Sheets-Sheet 1.

(No Model.)

J. MQINTYRE. SHIP BUILDING.

' PatentedAug. 9, 1887.

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3 Sheets-Sheet 2.

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J. MQINTYRB.

SHIP BUILDING.

Patented AugJQ, 1887.

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N. PETERS. Phnfouthagraphur. Wflhingiun. n.c4

(No Model.)

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J. M'OINTYRE.

3 SheetsSheet 3.

SHIP BUILDING. V

Patented Aug. 9, 1887.

UNITED STATES PATENT OEEIcE.

JAMES MOINTYRE,*OF BOSTON, MASSACHUSETTS, ASSIGNOR OF ONE-HALF TO JOHN A. STETSON, OF SAME PLACE.

SHIP-BUILDING.

SPECIFICATION forming part of Letters Patent No. 367,828, dated August 9, 1887.

Application filed February8,1886. Serial No. 191,113.

To all whom it may concern:

Be it known that 1, JAMES MOINTYRE, Boston, in the county of Suffolk and State of Massachusetts, have invented a new and useful Improvement in Ship-Building, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure 1 is a vertical section of the hulk embodying my invention on line 1'0 of Fig. 10 3. Fig. 2 is a vertical section of the same on line w w of Fig. 3. Fig. 3 is a sectional plan of a part of the box-keel on line at w of Fig. 1.

Fig. 4 is a longitudinal section on line 10 10 of Fig. 3, and Fig. 5 is a sectional detail on line yyofFigl.

- My invention consists, first, in the combination, with an angle-iron deck-beam integral with an angle-iron rib, of a planking and a filling which is between the planking and angle-iron.

Hitherto vessels have been built with angleiron deck-beams and angle-iron ribs in separate pieces, and these deck-beams have been bolted or otherwise secured to the ribs, thereby 2 forming a great number of joints, which are strained and weakened when the vessel is heavily freighted and when it encounters wood, instead of being in'contact with one of. In the old angle-- 40 the webs of the angle-iron.

iron ribs the angle formed by the two webs required to be varied to suit the curves of the vessel;but this difficult and tedious operation is unnecessary in myrib, one side of the wood filling being fitted to suit the curves, just as if the ribs were of wood. This operation was not only expensive in time and money, but also weakened the angle-irons. In vessels embodying my invention the bolts used to hold the planking are necessarily much longer than.

bolts which hold the planking in vessels whose (No model.)

planking is secured to a web of the angle-iron rib.

Another feature of my invention is a box keel formed with cross-pieces forming pockets for the ribs. The ribs are bolted to these crosspieces and a very solid and firm interior connection is formed between the box-keel and the ribs without the need of bolt-holes through the keel. After the ribs are in place the spaces between the cross-pieces may be filled with lead or ballast. This is very desirable for. yachts.

Another feature of my invention is a centerboard box of novel construction. 6

In the drawings I have shown my invention embodied in asingle-deck vessel and in the best way known to me. The compound rib A is made up of the angle-iron rib a and the filling a, the planking B being secured directly to the filling in a well-known way. The ends of the angle-iron, which in this case forms a deck-beam and two ribs, are preferably welded together. In Fig. 2 I have shown arib on each side of the vessel, extending above the deck to form stanchions, and the deck-beam is secured to this rib in the usual way. As only a few stanchion's that are extensions of the vessels ribs are required to give the sides of the vessel above the deck the strength required, the strength of a vessel embodying the first feature of my invention is practically not.- impaired by having some of its ribs and deckbeams in separate pieces. The plates 0 are braces to give greater strength to the vessel at 8 5 the corners formed by the deck-beams and ribs. The box-keel D is of cast metal, with or without the center-board box IE, and crosspieces d may be cast with the box-keel or otherwise connected to it. The box-keel D, as 0 shown in the drawings, has a center-board box E, which is provided with the strips 0, fixed in the box near the bottom of the keel and 7 adapted to receive the center-board between them. The strips 6 extend from one end of the 5 well to the other end, and are preferably made round, as shown, so as. to allow the centerboard to pass the more readily between them. When the center-board is between the strips 6, a practically close joint is formed, and the T00 inflow and outflow of water at the well, which now impedes the progress of center-board vessels, is reduced to a minimum, and the consequcnee is that the speed of the vessel is thereby increased and the noise occasioned by the wash of the water in the well is got rid of. 5 I am aware of Bilbcs English patent, No. 1,902, of 1856; Mollers German patent, No. 9,607, of 1879; Carters patent, No. 245,784, of 1881; La Mottes patent, No. 37,236, of 1862; Stoddards patent, No. 93.920, of 1869; and Robbins patent, No. 197,980, of 1877; and I disclaim all that is set forth in them.

\Vhat I claim as my invention is 1. A deck-beam integral with a rib, both formed of an angle'iron, a, in combination 15 with filling a and planking B, the filling being intermediate of the planking and angle-iron, substantially as and for the purpose set forth.

2. The box-keel D, formed of a continuous single piece of metal, having cross-pieces (Z at intervals to sustain the ribs, substantially as 20 and for the purpose set forth.

3. The box-keel D, formed of continuous metal, having the cross-pieces (l at intervals to sustain the ribs, and having the center-board box E integral with it, substantially as de- 25 scribed.

J AMES MUINTYRE.

Witnesses:

EDWARD S. BEACH, J OHN R. Snow. 

